PREPARATION OF ACTIVATED CARBON FROM TEA WASTE AND ITS APPLICATIONS FOR ADSORPTION OF BENTAZON FROM AQUEOUS SOLUTION
Activated carbon was prepared from tea waste by H2SO4 activation (TAC), and was applied toremove bentazon from aqueous solution. The TAC was characterized by Raman Spectrometer,X-ray diffractometer (XRD), and scanning electron microscope (SEM). The influence of pH(1,5 - 11), contact time (30 - 300 min), and the amount of adsorbent (0,01 - 0,05 g) onbentazon efficiency by the TAC were also investigated. The results show that the time to reachadsorption equilibrium and the optimal pH value for adsorption of bentazon are 180 min and3.0; 0,05g, respectively. The maximum monolayer adsorption capacity of TAC is 117,647mg/g. The as-prepared TAC therefore acts as a promising adsorbent for the pesticide removalfrom the polluted water.
Keywords: Adsorption; tea waste; Langmuir isotherrm; pesticides; bentazon.